J aw rubber-d am clamp



J. W. IVORY. MULTIPLE JAW'RUBBER DAM CLAMP.

APPLICATION FILED MAR. 4. I919.

Patented Nov. 11, 1919.

umr-ED STATES PATENT OFF 1 JAMES w. IVORY, or PHILADELPHIA, PENNsYL ANiA.

MULTIPLE-311W RUBBER-DAM CLAMP.

To all whom it may concern:

Be it known that I, JAMES V. IVORY, a subject of the King of Great Britain, residing in the city and county of Philadelphia, State of Pennsylvania, have invented a new and useful Multiple-J aw Rubber- Dam Clamp, of which the following is a specification.

My invention relates to a rubber-clam clamp and consists in providing the same with multiple jaws auxiliary to the mam or regular aWs, the same being adapted to embrace a tooth at the anterior-and distal buccal or lateral walls or corners of the crown of a tooth, and also at the anterior and distal lingual walls or corners of a tooth. These jaws may extend even to the biting surface of a tooth curving over the enamel on this surface and they serve as an additional support in conjunction with the regular jaws as fingers enveloping the crown and clamping horizontally curving and somewhat perpendicularly curving upward and inwardly from'said regular jaws, thus positively supporting and steadying the clamp in position.

The invention is satisfactorily illustrated in the accompanying drawing, but the important instrumentalities thereof may be varied, and so it is to be understood that the invention is not limited to the specific details shown and described, as long as they are within the spirit or scope of the claim.

Figure 1 represents a perspective view of a multiple jaw rubber dam clamp embodying my invention. a

Fig. 2 represents a plan view thereof.

Fig. 3 represents a transverse section thereof.

Fig. 4 represents a perspective view of another embodiment thereof.

Fig. 5 represents a side elevation thereof.

Fig. 6 represents a perspective view of another embodiment thereof.

Fig. 7 represents a side elevation thereof.

Fig. 8 represents a perspective view of another embodiment thereof.

Fig. 9 represents a side elevation thereof.

Fig. 10 represents a perspective view of another embodiment thereof.

Specificationof Letters Patent. Patented N 11, 1919. Application filed March 4, 1919. 7

Serial No. 280,617.

clamps shown in the Letters Patent No.

435,228, granted to me on the 26th day of August, 1890. V i I On the terminals of said jaws are .the auxiliary jaws 4 which rise therefrom and curve over and inwardly on their upper ends and embrace the anterior and distal buccal or lateral walls of a tooth or corners of the crown of a tooth, as shown in Figs.

1, 2,3, at, 5, 8 and 9, and they may extend over the biting surface of a tooth, as shown in Figs. 1, 2, 3, f and 5, and embrace the same, they being like the regular jaws subjected to the tension of said bow of the clamp.

In Figs. 6, 7, 8, 9, 10 and 11 auxiliary jaws 5 extend upwardly and downwardly to different degrees from the terminals of the regular jaws so as to embrace the necks and adjacent portions of the sides of the tooth, and embrace the same, and in all cases the auxiliary jaws serve in connection with the regular jaws as additional means for attaching the dam with a tooth, whereby the dam is most firmly supported and steadied in position.

The regular jaws are much more deisting in the ordinary rubber dam' clamps, whereby instead of their cutting edges bear- '85 pressed and curved than those hitherto ex-' ing against the buccal and lingual faces at the neck of the tooth the aws dip, and the edges of the jaws do not come directly against the neck of the teeth but face toward 1 the process, curving around the lateral angles of the neck and having a tendency to' pass between the lip of the gum surrounding the tooth and the sides of the neck, the ordinary bevel lying against the sides of the neck of the tooth.

When the additional jaws are placed on a napkin or roll clamp as in Fig. 8, they rigidly engage and hold the same, and the and are adapted to engage various portions clamp is prevented from tilting. of a tooth independent of said regular aws 10 Having thus described my invention What in difierent places from said regular jaws. I claim as new and desire to secure by Let- 5 ters Patent, is JAMES IVORY A rubber darn clamp having regular Witnesses: clamping ews, and a series of auxiliary JOHN A. WVIEDERsHEIM, aWs which extend from said regular aws N. BUSSINGER.

Copies of this patent may be obtained for five cents each, by addressing the .Gommissioner of Patents, Washington, D. G. 

